Tablet woofer and electronic device using same

Patent metadata

Field	Value
Publication number	US-10440478-B2
Application number	US-201715671929-A
Country	US
Kind code	B2
Filing date	Aug 8, 2017
Priority date	May 8, 2013
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

A tablet woofer and an electronic device using same. The woofer comprises a vibrating diaphragm, at least four mutually independent drive units ( 5 ), and a housing ( 3 ). The vibrating diaphragm is a rectangle shape, and comprises a rigid arc portion ( 1 ) at the central position and a spiral curve portion ( 2 ) at the periphery; the drive unit ( 5 ) comprises a voice coil unit and a corresponding magnetic circuit unit, and four angles of the arc portion ( 1 ) of the vibrating diaphragm are each combined with one voice coil unit; the housing ( 3 ) is provided with mounting holes ( 4 ) for accommodating and mounting the drive units ( 5 ), and sound holes penetrating through the mounting plane; the spiral curve portion ( 2 ) of the vibrating diaphragm is fixedly connected to the periphery of the upper side of the housing ( 3 ).

First claim

The invention claimed is:

1. A tablet woofer, comprising a vibrating diaphragm, at least six driving units independent of each other and a housing, wherein the vibrating diaphragm has a rectangular shape and comprises a rectangle dome portion at a central position and a suspension ring portion at an edge position, wherein
a ratio of an equivalent radius of an effective radiating area of the rectangle dome portion to a width of the suspension ring portion is in a range of 4 to 15;
the driving units comprise voice coil units and magnetic circuit units corresponding to the voice coil units; four voice coil units are bonded to four corners of the rectangle dome portion of the vibrating diaphragm, respectively; and the other voice coil units are provided at one or two groups of opposite sides of the rectangle dome portion, respectively, and are not in a same straight line with any two adjacent voice coil units of the four voice coil units at the four comers;
mounting holes for accommodating and mounting the driving units and sound holes penetrating through a mounting plane are arranged on the housing;
the suspension ring portion of the vibrating diaphragm is fixed and coupled to a peripheral region of an upper lateral surface of the housing;
the tablet woofer further comprising FPCB connectors electrically connecting an internal circuit of the woofer with an external circuit, wherein
a middle part of the FPCB connector is attached to a side of the vibrating diaphragm provided with the voice coil units.

2. The tablet woofer according to claim 1 , wherein the driving units have a round shape and comprise round voice coil units and round magnetic circuit units; and the four voice coil units at the four corners are bonded to a side of the rectangle dome portion close to the housing.

3. The tablet woofer according to claim 1 , wherein
the housing comprises the mounting plane and an annular side wall provided around the mounting plane, and the mounting holes for accommodating and mounting the driving units and the sound holes penetrating through the mounting plane are arranged on the mounting plane; and
an upper side surface of the annular side wall is fixedly connected with the suspension ring portion of the vibrating diaphragm.

4. The tablet woofer according to claim 3 , wherein
the sound holes comprise central sound holes and edge sound holes;
the central sound holes are arranged in a central position of the mounting plane; and
the edge sound holes are arranged between the annual side wall and the mounting holes.

5. The tablet woofer according to claim 4 , wherein the central sound holes have a round shape or a square shape; and the number of the edge sound holes is four, and each of the edge sound holes is strip-shaped.

6. The tablet woofer according to claim 3 , wherein a fixing plane is provided to extend from an outer edge of the annular side wall, and fixing holes for coupling with electronic devices are provided on the fixing plane.

7. The tablet woofer according to claim 1 , wherein
the number of the driving units is six, and the driving units comprises six voice coil units independent of each other and magnetic circuit units corresponding to the voice coil units;
wherein four voice coil units thereof are provided at four corners of the rectangle dome portion, respectively, and the other two voice coil units are located at central positions of one group of opposite sides of the rectangle dome portion, respectively, and
a spacing between the other two voice coil units located at the central positions of one group of opposite sides of the rectangle dome portion is less than a spacing between the two voice coil units at the corners.

8. The tablet woofer according to claim 1 , wherein
the FPCB connector is strip-shaped, and two end parts of the FPCB connector pass through the edge sound holes and extend to a side of the mounting plane away from the vibrating diaphragm.

9. The tablet woofer according to claim 1 , wherein
the rectangle dome portion has a rigid structure, a honeycomb structure or a foaming body structure;
the suspension ring portion is made of PU or silicon rubber.

10. The tablet woofer according to claim 1 , wherein the housing is made of aluminum alloy material.

11. An electronic device comprising the tablet woofer according to claim 1 and a peripheral frame for fixing the woofer, wherein
a rear acoustic cavity is formed between the peripheral frame and the woofer;
the rear acoustic cavity is communicated with a space behind the vibrating diaphragm through the sound holes.

12. The electronic device according to claim 11 , wherein acoustic absorbing material or gas adsorption material is provided in the rear acoustic cavity.

13. A tablet woofer, comprising a vibrating diaphragm, six driving units independent of each other and a housing, wherein the vibrating diaphragm has a rectangular shape and comprises a rectangle dome portion at a central position and a suspension ring portion at an edge position, wherein
a ratio of an equivalent radius of an effective radiating area of the rectangle dome portion to a width of the suspension ring portion is in a range of 4 to 15;
the driving units comprise six voice coil units and magnetic circuit units corresponding to the voice coil units; four voice coil units are bonded to four corners of the rectangle dome portion of the vibrating diaphragm, respectively; and the other voice coil units are provided at one or two groups of opposite sides of the rectangle dome portion, respectively, and are not in a same straight line with any two adjacent voice coil units of the four voice coil units at the four corners;
mounting holes for accommodating and mounting the driving units and sound holes penetrating through a mounting plane are arranged on the housing;
the suspension ring portion of the vibrating diaphragm is fixed and coupled to a peripheral region of an upper lateral surface of the housing;
wherein four voice coil units thereof are provided at four corners of the rectangle dome portion, respectively, and the other two voice coil units are located at central positions of one group of opposite sides of the rectangle dome portion, respectively, and
a spacing between the other two voice coil units located at the central positions of one group of opposite sides of the rectangle dome portion is less than a spacing between the two voice coil units at the corners.

14. The tablet woofer according to claim 13 , wherein the driving units have a round shape and comprise round voice coil units and round magnetic circuit units; and the four voice coil units at the four corners are bonded to a side of the rectangle dome portion close to the housing.

15. The tablet woofer according to claim 13 , wherein
the housing comprises the mounting plane and an annular side wall provided around the mounting plane, and the mounting holes for accommodating and mounting the driving units and the sound holes penetrating through the mounting plane are arranged on the mounting plane; and
an upper side surface of the annular side wall is fixedly connected with the suspension ring portion of the vibrating diaphragm.

16. The tablet woofer according to claim 15 , wherein
the sound holes comprise central sound holes and edge sound holes;
the central sound holes are arranged in a central position of the mounting plane; and
the edge sound holes are arranged between the annual side wall and the mounting holes.

17. The tablet woofer according to claim 16 , wherein the central sound holes have a round shape or a square shape; and

Assignees

• Goertek Inc

Inventors

• Jiang Chao
• Yang Jianbin
• Li Zhi
• Jiao Qijin

Classifications

• H04R7/127

  dome-shaped · CPC title

• H04R2499/11

  Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's · CPC title

• H04R2499/15

  Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops · CPC title

• H04R9/063 Primary

  using a plurality of acoustic drivers (H04R1/24 and H04R1/403 take precedence) · CPC title

• H04R7/18

  at the periphery · CPC title